Intensity of the electric field can be identified by knowing the force (F) and point charge (P). Electric field formula is used to find the electric charge being influenced by a particular field. The electric field due to point charge is completely outward from a positive charge and radially inwards toward a negative point charge. Electric field is compared to the acceleration due to gravity (g). By knowing about gravity, we can identify how electric charges respond to electric forces.
Electric field is a vector quantity, because it has both magnitude and direction. Its SI unit is newtons per coulomb (NxC-1) or volts per metre (Vxm-1). Electric charges or magnetic fields causes the electric field. Electric field due to point charge can be found using electric field formula.